DONG Tingjian,LI Ke,CHEN Yajun,et al.Research on Thickness Uniformity of Silver Coating Based on Finite Element Simulation[J].Plating & Finishing,2021,(11):7-12.[doi:10.3969/j.issn.1001-3849.2021.11.002]
热轧碳钢SPHC在天津大气环境中的腐蚀行为
- Title:
- Research on Thickness Uniformity of Silver Coating Based on Finite Element Simulation
- 文献标志码:
- A
- 摘要:
- 针对热轧钢SPHC的大气腐蚀问题，通过在天津自然环境下开展为期1年的SPHC钢大气暴露试验，依托腐蚀动力学分析、锈层形貌观察、腐蚀产物成分分析、电化学测试等研究了SPHC钢在天津大气环境中的腐蚀行为。结果表明，在暴晒6个月时，SPHC钢的腐蚀速率开始下降，腐蚀产物主要为γ-FeOOH、α-FeOOH和Fe3O4，随着暴露时间的增加γ-FeOOH逐渐向更稳定的腐蚀产物转化，表面较为致密的腐蚀产物含量增多，同时锈层不断增厚形成了双层结构，对基体的保护性逐渐增强，整体耐蚀性不断提高。
- Abstract:
- Aiming at the atmospheric corrosion problem of hot-rolled steel SPHC, a one-year atmospheric exposure test was carried out in Tianjin. Relying on corrosion kinetic analysis, rust layer morphology, corrosion product analysis and electrochemical test, the atmospheric corrosion behavior of SPHC steel in Tianjin was studied. The result shows that the corrosion rate of SPHC steel begins to decrease after 6 months of exposure. The corrosion products are mainly γ-FeOOH, α-FeOOH and Fe3O4. As the exposure time increases, γ-FeOOH gradually transforms into more stable corrosion products, and the content of denser corrosion products on the surface increases. At the same time, the rust layer continues to thicken and form a double-layer structure, which gradually increases the protection of the substrate and the overall corrosion resistance.
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备注/Memo
收稿日期： 2021-03-31；修回日期： 2021-04-19
作者简介： 董艇舰（1963—），男，博士，副教授，tjdong@cauc.edu.cn．
*通信作者： 宋肖肖，xxsong@cauc.edu.cn
基金项目： 中央高校基本科研业务费项目中国民航大学专项资助（3122019112）